Cutter chain



@377/ ,l v/I Feb- 2, 1943- J. oBERsTl-:xN 2,310,0'6a- CUTTER CHAIN Filed Sept. 2, 1941 'AT1-anun Patented Feb. 2, 1943 UNITEDY STATES PATENT OFFICE CUTTER CHAIN Edward J. Doberstein, Blue Island, lll., assignor to Goodman Manufacturing Company, Chicago, Ill., a corporation of Illinois Application September 2, 1941, Serial No. 409,203

(Cl. i4-254) 8 Claims.

This invention relates to improvements in cutter chains for mining machines and has as its principal objects to provide a novel and simple form of renewable connection between the bit carrying blocks and the connecting links of a cutter chain, so arranged as to securely connect the links together and to afford ready detachability and renewal of the connecting parts of the chain.

Other objects of my invention will appear from time to time as the following specication proceeds and with reference to the accompanying drawing wherein: 4 Figure 1 is a view in side elevation of a cutter chain, showing the links connected together by a connecting means constructed in accordance with my invention;

Figure 2 is an enlarged sectional View Vtaken substantially along line 2-2 of Figure 1;

Figure 3 is an enlarged detail isometric view of the means for connecting the links of the chain together;

Figure 4 is a fragmentary view in side elevation showing a modified form in which my invention may lbe embodied;

Figure 5 is a sectional view taken substantially along line 5-5 of Figure 4; and

Figure 6 is a sectional view taken substantially along line 6-6 of Figure 4.

Referring now to Figures 1 and 2 of the drawing, the cutter chain shown is of a usual endless block and link type including a plurality of cutter bit carrying blocks I0, I0, herein shown as being pivotally connected together by means of pairs of laterally spaced interengaging connecting straps II, II.

Each strap II, as herein shown, is provided with a pair of longitudinally spaced inwardly extending bosses I2 and I3. The rst mentioned of said bosses is provided with a socket I4 and the other is provided with a projecting portion I5. Said socket and projecting portions are so arranged as to have interengaging connection with similar socket and projecting portions of the opposite strap of the link, so the outer peripheries of abutting bosses may provide a pivotal bearing for an apertured portion or eye II of said bit carrying block. Y

Referring now in particular to the novel means for holding the straps I I, II in connected relation with respect to each other, a split connecting pin I8, divided into two halves I9, I9, is provided. Each of said halves of said pin has a head 20 formed on each end thereof, adapted to register for engagement with a shouldered portion 22 of aligned apertured portions of said bosses, for receiving said pin, so ysaid pin may hold said bosses in connected relation with respect to each other. The outer portions of said halves, between said heads, form curved Vengaging surfaces adapted to extend within and to be engaged with said aligned apertured portions of said bosses by means of a locking key 2|.

The inner sides of each of said halves of said split pin are fiat and said iiat lportions of said halves are adapted to be engagedby opposite sides of the locking key 2I, for holding said halves in spaced relation with respect to each other.` Said locking key has a head 24 at one end thereof which is adapted to engage inner shouldered portions 25, 25 of said halves of said pin. The' opposite end of said key is adapted to be upset when said split vpin andkey are in engagement with the drilled portion of abutting straps and engage the opposite inner shouldered portions 25, 25 of said halves of said split pin, for locking said split pin in position and positively holding said straps together.

It may be seen with reference to Figures 1 and 3 that when it is desired to fasten the straps II, II together, the flat portions of the split pin I8 are placed in abutting relation with respect to each other and the heads of said halves of said pin are passed through the aperturedportion of the lugs of said straps until the heads thereof engage the recessed shouldered portions 22, 22 of said straps.

When said split pin is properly positioned with relation to said straps and the heads thereof are in engagement with the recessed shouldered portions of said straps, the locking key 2I may be inserted between the insides of the halves of said split pin, to hold said halves in spaced relation with respect t0 each other and to lock said pin in position. The end of said locking member opposite from its head may then be upset, to engage the recessed shouldered portions 22, 22 of the insidesof the halves of said split pin and to form a means for positively locking the halves of said split pin in spaced re- -the links oi the chain and a bushing 3I is shown as being mounted within this bushing. The split pin I8 is shown as passing through said inner bushing, the length of which inner bushing is herein shown as being equal .to the distance between the heads of said pin. In this form of my invention, a locking key 33 is provided, which is similar to the locking key 2| but which has opposite, inwardly extending, projecting lugs 34, 34 adapted to register for engagement with notches 34', 34' formed in said inner bushing, to hold said bushing from turning. An outer side of one of the links of the chain is provided with oppositely disposed notches 35, 35, adapted to be engaged by the upset portion of said locking key, to hold said key and split pin from turning movement and to lock said split pin and bushings in the chain. Such a connection is particularly advantageous for use in a chain of an alternate yoke and eye construction wherein the yokes of the chain are made from an integral piece, making it necessary to mount the eyes on a bearing member or bushing.

While I have herein shown and described one form in which my invention may be embodied, it will be understood that the construction thereof and the arrangement of the various parts may be altered Without departing from the spirit and Vscope thereof. Furthermore, I do not wish to be construed as limiting my invention to the specific embodiment illustrated, excepting as it may be limited in the appended claims.

I claim as my invention:

1. In a cutter chain, a plurality of links, and means for pivotally connecting said links together comprising a split pin, and a locking key having opposite flattened sides adapted to engage the inner sides of opposite parts of said split pin, for

holding said parts in spaced relation with respect i to each other.

2. In a cutter chain, a plurality of links, and means for pivotally connecting said links together comprising a split pin, each half of said split pin having enlarged head portions on opposite ends l inner shouldered portions formed in the halves of said pin, and the opposite end of said locking member adapted to be upset to engage opposite shouldered portions of the halves of said pin, to lock said pin in position.

3. In a cutter chain, a plurality of links pivotally connected together, and means for pivotally connecting said links together comprising a pin divided into two halves having enlarged heads at each end thereof, the heads of said pin being adapted to t through apertured yportions of said links, when the inner sides of the halves of said pin are together, and means for spreading said halves of said pin and holding them in spaced relation with respect to each other including a locking key having opposite attened sides adapted to engage the inner sides of the halves of said pin.

4. In a cutter chain, a plurality of links pivotally connected together, and means for pivotally connecting said links together comprising a pin divided into two halves, each of which halves has enlarged heads at each end thereof, the heads of said halves of said pin being adapted to t through an apertured portion of said links when the inner sides of the halves of said pin are in abutting relation with respect to each other, and means for spreading said halves of said pin and holding them in spaced relation with respect to each other including a locking key having opposite `flattened sides adapted to engage the inner sides of the halves of said pin, said locking member having a head on one end thereof adapted to engage shouldered portions on the inside of the halves of said pin and the opposite end of said locking key being adapted to be upset, to engage shouldered portions on the insides of the opposite halves of said pin.

5. In a cutter chain, a plurality of alternately arranged bit carrying and connecting links, and means for pivotally connecting said links together comprising a bushing extending through one of said links and a split pin extending through said bushing and another of said links, opposite ends of the halves of said pin having enlarged heads and said heads being adapted to pass through said bushing, When said halves of said pin are together, and a locking key having opposite at faces adapted to engage the insides of the halves of said pin and to hold them in spaced relation with respect to each other, for locking said split pin and bushing in engagement with said links.

6. In a cutter chain, a plurality of alternately arranged Ybit carrying and connecting links, and means for pivotally connecting said links together comprising a bushing extending through one of said links and a split Vpin extending through said bushing and another of said links, opposite ends of the halves of said pin having enlarged heads and said heads being adapted to pass through said bushing when said halves of said pin are together, and a locking key having opposite ilat faces adapted to engage the insides of the halves of said pin and to hold them in spaced relation with respect to each other, for locking said pin and bushing in engagement with said links, said locking key having a portion adapted to be engaged with one of said links to lock said split pin from turning movement with respect to said link.

7. In a cutter chain, a plurality of links pivotally connected together, and mea'ns for pivotally connecting said links together comprising a split pin, each portion of said split pin having enlarged heads at each end thereof, the heads of said pin being adapted to t through apertured portions of said links, when the inner sides of the halves of said pin are together, recessed portions in said links of said chain adapted to receive said heads, and a locking key having opposite engaging surfaces adapted to engage and hold opposite sides of said split pin in engagement with said apertured portions and hold said heads in engagement with said nrecessed portions, to prevent turning movement of said key and split pin with respect to said outer links.

8. In a cutter chain, a plurality of alternately arranged bit carrying and connecting links, and means for pivotally connecting said links together comprising a bushing having one of said links pivotally mounted thereon, a split pin extending through said bushing and having heads on opposite ends thereof adapted to engage recessed portions of another of said links, and means for spreading said pin and holding it in engagement with said Ibushing and holding said heads in engagement with said recessed portions, to prevent turning movement of said pin with respect to said link including a locking key having opposite engaging surfaces adapted to engage the insides of the halves of said pin and having interengaging connection with said bushing, to hold said bushing from turning movement with respect to said other link. Y

EDWARD J. DOBERSTEIN. 

